This is a very classic trek can be 25 to 27 day's that fly to Tumlingtar from Kathmandu,Trek begin from Tumlingtar, goes to Arun Valley following the Arun River Valley, Salpa Pass, Bung, Lukla, Gokyo, Chola Pass, Everest Base Camp Kalapattar, Chhukung, Lukla,fly from Lukla to Kathmandu.